/*
 * @(#)CopyAction.java
 *
 * Copyright (c) 1996-2010 by the original authors of JHotDraw and all its
 * contributors. All rights reserved.
 *
 * You may not use, copy or modify this file, except in compliance with the 
 * license agreement you entered into with the copyright holders. For details
 * see accompanying license terms.
 */
package org.jhotdraw.app.action.edit;

import java.awt.KeyboardFocusManager;
import java.awt.event.ActionEvent;

import javax.swing.JComponent;
import javax.swing.TransferHandler;

import org.jhotdraw.gui.datatransfer.ClipboardUtil;
import org.jhotdraw.util.ResourceBundleUtil;

/**
 * Copies the selected region and place its contents into the system clipboard.
 * <p>
 * This action acts on the last {@link org.jhotdraw.gui.EditableComponent} /
 * {@code JTextComponent} which had the focus when the {@code ActionEvent} was
 * generated.
 * <p>
 * This action is called when the user selects the Copy item in the Edit menu.
 * The menu item is automatically created by the application.
 * <p>
 * If you want this behavior in your application, you have to create an action
 * with this ID and put it in your {@code ApplicationModel} in method
 * {@link org.jhotdraw.app.ApplicationModel#initApplication}.
 * 
 * @author Werner Randelshofer
 * @version $Id: CopyAction.java 717 2010-11-21 12:30:57Z rawcoder $
 */
public class CopyAction extends AbstractSelectionAction {

	public final static String ID = "edit.copy";

	/** Creates a new instance which acts on the currently focused component. */
	public CopyAction() {
		this(null);
	}

	/**
	 * Creates a new instance which acts on the specified component.
	 * 
	 * @param target
	 *            The target of the action. Specify null for the currently
	 *            focused component.
	 */
	public CopyAction(JComponent target) {
		super(target);
		ResourceBundleUtil labels = ResourceBundleUtil.getBundle("org.jhotdraw.app.Labels");
		labels.configureAction(this, ID);
	}

	@Override
	public void actionPerformed(ActionEvent evt) {
		JComponent c = target;
		if (c == null && (KeyboardFocusManager.getCurrentKeyboardFocusManager().getPermanentFocusOwner() instanceof JComponent)) {
			c = (JComponent) KeyboardFocusManager.getCurrentKeyboardFocusManager().getPermanentFocusOwner();
		}
		// Note: copying is allowed for disabled components
		if (c != null) {
			c.getTransferHandler().exportToClipboard(c, ClipboardUtil.getClipboard(), TransferHandler.COPY);
		}
	}
}
